POZO COLORADO, Paraguay — Paraguayans elected Santiago Peña, a 44-year-old conservative economist, as their new president on Sunday, keeping the South American nation in the control of the right-wing Colorado Party that has run the country for all but five of the past 76 years. The result means that Paraguay, a landlocked nation of seven million people, has resisted the leftward shift across Latin America in recent years. Instead, Paraguayans delivered victory to a right-wing candidate who made vague promises to add jobs, lower energy prices and clear drug addicts from the street. Mr. Peña had 43 percent of the vote with 99 percent of the ballots counted, defeating two challengers who split the opposition vote. Mr. Peña is a political protégé of a former Paraguayan president, Horacio Cartes, who is one of its richest men and the president of the Colorado Party.

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